213 
lowermost pair of leaflets; stipules linear, membranaceous; ra- 
cemes loosely many-flowered, becoming corymbose at termina- 
tions of branches; sepals ovate-lanceolate, striated ; legume straight, 
acute, apparently indehiscent, subglabrous, very much compressed, 
5 cm. long, .5 cm. wide; seeds numerous. 
Texas, New Mexico and Arizona, extending south into Mexico. 
Section B. ONCoLosBIUM. 
Shrubs or herbs. Perfect stamens 7, staminodia 3. Legume 
turgid or compressed, often arcuate, dehiscent along both sutures, 
variable in length. 
I. Leaves 4-8 foliolate, sharply acuminate ; legume linear, elongated. 
7. CASSIA LEPTOCARPA Benth. - 
Cassia leptocarpa Benth. Linnea, 22: 528 (1849). ; 
; Fruticose or suffruticose, tall, branching, pubescent, leaves 5—7 
foliolate; leaflets acuminate, lanceolate, basally symmetrical, 
densely pubescent, 5-6 cm. long, 1.5—-1.8 cm. wide; petiolar gland 
large, sessile, obconical ; stipules lanceolate, foliaceous, caducous ; 
inflorescence in short axillary racemes; calyx corolla-like, the oval 
Sepals not Surpassing the petals; legume narrowly linear, subgla- 
brous, with prominent sutures, 20-25 cm. long, .3 cm. wide; seeds 
very numerous, quadrilaterally compressed. 
-New Mexico and Arizona, extending south into Mexico. 
8. CASSIA OCCIDENTALIS L. 
Cassia occidentalis L. Sp. Pl. 539 (1733)- 
Tall, annual, herbaceous, glabrous; leaves 4-6 foliolate; leaf- 
lets lanceolate, becoming lance-elliptical, subglaucous beneath, 
3-0-5 cm. long, 1-2 cm. wide; petiolar glands 2, sessile, conical, © 
situated between lowermost pair of leaflets ; stipules filiform, ca- 
wcous ; flowers large, in closely-crowded axillary racemes ; sepals 
rather short, oval or lance-ovate ; legume linear, turgid, slightly 
‘ompressed, glabrous, straight, or arcuate, the sypta externally 
ent, 11 cm. long, 6 cm. wide; seeds numerous, parallel with 
€ transverse septa. 
Virginia and Southern Indiana, southward into Mexico. (Ad- 
Yentive or naturalized from Tropical America.) 
9. CASSIA LIGUSTRINA L. 
Cassia ligustrina L. Sp. Pl ae on 
Sp Pigat hey | oe 
ee Herbaceous, glabrous; stem with prominent longitudinal 
